Spindle bearing



J. HIRVONEN SPINDLE BEARING Feb. 25, l 930.

Filed April 4, 1929 3 Sheets-Sheet 1 E. J. HIRVONEN SPINDLE BEARING Feb.25, 1930.

3 Sheets-Sheet 2 Filed April 4, 1929 Feb. 25, 1930. Rv 'NEN 1,748,174

SPINDLE BEARING Filed AprilJl, 1929 3 Sheets-Sheet 3 I326 1. g5)- 06war? fitented Feb. 25, 1930 warren stares PATENT OFFICE BRIG I. HIBVOIN'EN'. OF WORCESTER, MASSACHUSETTS, ASSIGNOR 'r'o LELAND-GIFFORD comm,IA.

1 srnvnnn Application filed April 4,

This invention relates to a bearing means for a high speed spindle andis'particularly adapted for application tothe spindle of a grindingmachine.

p The principal objects of the invention are to provide a ball bearingthat will stand up under a very high speed; to provide a simpleandeonvenient means by which either the inner or' outerrace of a set ofball bearings can be used as the supporting and bear-.

ing members of the two ends of a spindle and all those at each end canbe adjusted or taken up finely and accurately by a single adjustment;also to provide improvements in the way of connecting the several ballraces whereby they will all be adjusted at thesame time and to provideeccentric mountings for them to permit of suchadjustment to take upwear.

Other objects and advantages of the inv en-- tionwill appearhereinafter.

Reference is to be had to the accompanymg drawings "'in which Fig; 1 isa diametrical sectional view of a bearing constructedin accordance withthis invention;

2 is a sectional view on the line 2-2 of Fig. 1; V

Fig. 3 is a sectionalview on the line 33 of Fig. 1; 7

Fig. 4 is a radial sectional view on the line 44 of Fig. 3;

Fig.5 is a sectional view on the line 5-.-5 of gFig; 7 l v Fig. 6isa-view similar to'Fig. 1 of a modified form of the invention,"and. v

w i .7 is a sectional view of the same on the broken line 7-7 of Fig..6..

The invention isgshown as applied to a spindle 10 of a grinding machine,this spindle being shown as provided with the usual concentric extension11 for receiving a motion of rotation at an extremely high speed fromthree wheels 12. or by any other'means, and as provided with a grindlngwheel 13 at the opposite end secured to it in any usual way. The ballbearings. ordinarily employed, even when constructed of the bestmaterials known, will last only a short time at these excessive speedswhich may be as much as 60,000

conrona'rzon or mss'acnosnrrs BEARING 192a Serial No. 352,588.

R. P. M. In order to provide the necessary degree of durability I mountthe ball hearingsin such a way that their speed will be much less thanthat of the spindle.

A head 14 is carried fixedlyin the frame 15 of the machine. This head isprovided at'the back with an annular plate 16 screwed in and having aplug 17 screwed in the center ofit surrounding the end of the spindle10. On the other end is a screw-cap 18 having a similar central member19 on the spindle rotating freely in an annular plate 20 screwed intothe end of the cap. The other partsare all contained Within theseelements that have been described. a

In screw threaded openings in the cap are two screw plugs 21 adapted tobe removed for exposing the heads of two screws 22 and 23. Theadjustment is provided for by in- Serting a screwdriver through theseopenings anduttirning these screws. The screw 22 is threaded only on itsend for receiving a pair of nuts 24 and is located within a sleeve 25whichis provided with a gear 26 thereon.

The nuts 24 areadjusted tohold the sleeve between them and the gear 26in the head 14.

Fixed to this screw or shaft 22 is a collar 27 having a pin 28 extendinginto a notch in the end of the sleeve 25 so that when the screw or shaft22 is turned bv the screw driver the sleeve 25 must nect'sarily turnwith it. This, of course-not only turns the gear 26 but it turns aneccentric-end 29 to adjust theposition of the inner race 30 of a ballbearing mounted on this'end. The ball bearing also 1 has an outer race31. The inner race is held against longitudinal shifting by the collar27.

There are three of these structures equally P located there. These nuts34 engage the edge the wear on the spindle at that end accurately,without etting 1t out of center. The ot er screw plug 21 covers thescrew 23 inside which is constructed in a similar way with. nuts 34,sleeve and gear 36. This gear, however, is located at the opposite endof the bearing. On the outer end is a fixed collar, 37 having its pin 38and the sleeve has an eccentric portion 39 at the inner end suprting theinner race 40 of the ball bearing of the inner race 40. The outer race41 engages the spindle 10 in a groove 42 provided or that purpose. Acentral car 43 meshes with the three gears 36 and,.li ethe gear 33, hasits bearing on the inner edge of the head 14.

It will be seen'that the two ends ofnthe indle are supported in similarways and t at the turning of the shafts 22 or 23 will result in changingthe positions of the eccentrics 29 or 39 around the spindle 10 andtaking up the wear at e'itherend of that spindle fineameters severaltimes'the diameter 0 is comparatively great.

In. the form shownin'Figs. 6 and 7 two changes are made. Three adjustingshafts are used instead of six, having their adjustments at both ends,and the s indle 10 is sup ported by the inner races of t e ball bearingsinstead of the outer races. In this case a head 44 is shown havin aplate 46 and central hub 47 at one end an a cap 48 at the other withrings 49 and 50 as described before. The cap 48 is held in stationaryposition with respect to the head 44 by one or more screws 51 while asingle adjusting screw 52 is inserted in the cap having a pinion 53fixed thereon which meshes with an internal gear 54 carried in this caseby the cap. This ro'vides' the adjustment and it meshes wit three gears55 carried on asman sleeves 59. The three shafts 56 carry ball arings ateach end having an outer race 57 and an inner race 58, the

inner race bearing on the shaft 56 and 'the outer races being carrieddirectly by the sleeves 59 in sockets provided for the same.

These outer races are eccentrically'mounted in the sleeves 59 in whichthey are carried,

. which sleeves carry the gears 55 so it will be seen that, by turninthese gears in the manner described, the eeves W111 be turned and theposition of the shafts 56 will be changed.

Beyond the inner races 58 on the shafts 56 or integral with them ifdesired, are bearing wheels 60. It will be noted that these parts justdescribed are duplicated at the two ends I of the machine.

The six shafts 56 bear on the spindle 10in grooves around the same andsupport it. Thus it will be seen that the adjustment of the screw 52'will adjust each of the eccentric bearings e ually and take 1(11p wearon the spindle 10 which is sup rte really b inner races of the ballbearings instead o directly by the outer races as in the form shown inthe first five figures. a

In both forms the adjustment is simple and accurate and there is no wayfor the parts to get out of center and no occasion for much wear on theadjusting surfaces but wear on the bearing surfaces can be taken up veryeasily by this ad'ustment.

Although I have illustrated and described bearing wheels 60 on the threeonly two forms of the invention I am aware I 1. In a bearin for aspindle or shaft, the

combination with a supporting hub and said spindle of a set of ballbearings arrangedaround the spindle and bearing on it, an eccentricsupport for each ball bearing and means for simultaneously adjusting thesupports of said ball bearings from a'single one of them to take up wearall around the spindle equally.

2. In a spindle supporting device, the combination with a spindle and asuppolrlt fit:

which it is mounted, of a lurality o arrangedaround the spin e in the.su port, a gear on each shaft, a central gear ree to turn and meshingwith all of the said gears, ball bearings supporting said spindle at oneend, eccentric means connected witheach of said shafts for carrying oneof the ball bearings, whereby when one of said eccentric means is turnedthe other two will be turned I through the said gears to adjust all theball bearings equally toward the axis of the spindle. I

3. The combination with a s indle and a 'supportin means therefor, o aseries of three ball H: 'for ca the spindle, three sleeves avmgeccentric portions on which the inner races of the ball bearings at eachend are mounted, and means for connecting the three spindles supportingeach end 0 the sleeve together so that they will have to turn to etherfor ad- 'ustment the outer. races of sai earing directly onthe spindleing it.

4. In 7 I the combination of two sets of three shafts,

g each end of ball bearings and supporta device of the'characterdescribed, 7

means at one end of the structure for turning ,each of said shafts, asleeve in which each shaft is located, a collar fixed on one shaft ofeach set and having a pin engaging in the corresponding'sleeve, wherebythe sleeve will turn with the shaft, each sleeve havin an eccentricprojection, an internal race or a ball bearing mounted on saidprojection, the external races of said ball bearings bearing directly onthe spindle .to be supported, whereby the bearings of each end of thespindle can be taken up independently of those at the other end. v

5. In a device of the character described,

the combination of three shafts surroundin a central axis, a ballhearing at the end 0 each shaft, the inner races "of said ,ball bear-,

ings being mounted on said shafts, three sleeves carried at both ends bythe outerraces of saidiball bearings, the outer races being seteccentrically in said sleeves and the-sleeves supported concentrically,a 'wheel on each end of each shaft supported like the inner races of theball bearings, said wheels being adapted to bear on the surface of thespindle to be supported near each end, a gear on each sleeve, and aninternal gear surrounding the three gears and meshing with them, wherebyby the turning of the internal gear the three -sleeves will be turnedequally to give equal fixed my signature.

adjustment to the six bearings.

6. In a device of the character described, the combination with aspindle, and means for driving the spindle at high speed, of a bearingdevice for the spindle comprising anti-friction bearings arranged aroundthe 1 axis in the spindle and each bearin having a race bearing on thespindle, sai spindle having a groove therearound for receiving, saidrecess whereby the s eed of the races will be very much less than t espeed of'the spindle, each of said races bein mounted eccentrically'andmeans 'for a justing the 'said' races simultaneously to take up wear.

In testimony whereof I have hereunto af- ERIC J, 'HIRTVONEN.

